Teenage pregnancy has a high socioeconomic impact. The objective of this research was to

interpret the meanings of sexuality and pregnancy of girls under 15. An interpretive qualitative

study from the phenomenological approach of Alfred Schütz over common sense was carried out. 18 life stories were written with girls under 15 years who had pregnancy experiences in the cities of Bogota, Cali, Cartagena and Medellin. The meanings of menarche, the sexual onset, marriage, contraceptive use and delivery care are influenced by the social and institutional moral agency. The moral enterprise circulates through the spaces of socialization of teenagers: mothers, fathers, homes, institutions and professionals in the health and education sector which classify according to their common sense what is right or “normal” for teenage girls